The use of the Yeasture and Belugatex I, II as probiotics on growth parameters and Survival of Rainbow trout, oncorhynchus mykiss larvae

Subject Areas : New Technologies in Aquaculture Development

Received: 2020-12-08 Accepted : 2020-12-08 Published : 2012-02-20

Keywords: Rainbow trout, Probiotic, Oncorhynchus mykiss, Larvae, Yeasture, Keywords: Belugatex,

Abstract :

Abstract[1] In this experiment the effect of probiotic supplementation in diet of rainbow trout larvae was evaluated using Yeasure (0.1, 0.2 and 0.3 kg/metric tonn of diet), BelugatexI (2, 5 and 9×10 CFU/g food), Belugatex II (2, 5 and 9×10 CFU/g food) and a Mixture of these probiotics and a control group (with no supplemental probiotic) for 60 days. Eleven treatments in a sixty days experimental period was performed on 3300 rainbow trout larvae (oncorhynchus mykiss) in three replication. Bioassyas were performed each 7 days interval along the experiment. Growth indicies was measured, including body length, feed conversion ratio (FCR), specific growth rate (SGR), condition factor (CF) and survaivability. The results of the experiment indicated that highest growth indices (Body weight, SGR and CF) and best FCR belong to groups fed standard diet supplemented with blugatex II probiotic (9×10 CFU Belugatex I/g food). And there was a significant statistical difference between treatments (p <0.05). All probiotic treatments cause better results in body weight gain, SGR, CF and FCR compared with control group. Benefical effects of lactic acid producing bacteria as supplement probiotic was proved in this study, thus using lactic acid bacteria as probiotic additive in diet of rainbow trout is recommended. *- Corresponding Authors; Email: [e-mail]